2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/mlx4/cq.h>
35 #include <linux/mlx4/qp.h>
36 #include <linux/mlx4/cmd.h>
40 static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
46 int mlx4_en_create_cq(struct mlx4_en_priv *priv,
47 struct mlx4_en_cq **pcq,
48 int entries, int ring, enum cq_type mode,
51 struct mlx4_en_dev *mdev = priv->mdev;
52 struct mlx4_en_cq *cq;
55 cq = kzalloc_node(sizeof(*cq), GFP_KERNEL, node);
57 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
59 en_err(priv, "Failed to allocate CQ structure\n");
65 cq->buf_size = cq->size * mdev->dev->caps.cqe_size;
69 cq->vector = mdev->dev->caps.num_comp_vectors;
71 /* Allocate HW buffers on provided NUMA node.
72 * dev->numa_node is used in mtt range allocation flow.
74 set_dev_node(&mdev->dev->persist->pdev->dev, node);
75 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
76 cq->buf_size, 2 * PAGE_SIZE);
77 set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node);
81 err = mlx4_en_map_buffer(&cq->wqres.buf);
85 cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf;
91 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
98 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
101 struct mlx4_en_dev *mdev = priv->mdev;
103 int timestamp_en = 0;
104 bool assigned_eq = false;
106 cq->dev = mdev->pndev[priv->port];
107 cq->mcq.set_ci_db = cq->wqres.db.db;
108 cq->mcq.arm_db = cq->wqres.db.db + 1;
109 *cq->mcq.set_ci_db = 0;
111 memset(cq->buf, 0, cq->buf_size);
113 if (cq->is_tx == RX) {
114 if (!mlx4_is_eq_vector_valid(mdev->dev, priv->port,
116 cq->vector = cpumask_first(priv->rx_ring[cq->ring]->affinity_mask);
118 err = mlx4_assign_eq(mdev->dev, priv->port,
121 mlx4_err(mdev, "Failed assigning an EQ to CQ vector %d\n",
130 irq_to_desc(mlx4_eq_get_irq(mdev->dev,
133 /* For TX we use the same irq per
134 ring we assigned for the RX */
135 struct mlx4_en_cq *rx_cq;
137 cq_idx = cq_idx % priv->rx_ring_num;
138 rx_cq = priv->rx_cq[cq_idx];
139 cq->vector = rx_cq->vector;
143 cq->size = priv->rx_ring[cq->ring]->actual_size;
145 if ((cq->is_tx && priv->hwtstamp_config.tx_type) ||
146 (!cq->is_tx && priv->hwtstamp_config.rx_filter))
149 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt,
150 &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq,
151 cq->vector, 0, timestamp_en);
155 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
156 cq->mcq.event = mlx4_en_cq_event;
159 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq,
162 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
163 napi_hash_add(&cq->napi);
166 napi_enable(&cq->napi);
172 mlx4_release_eq(mdev->dev, cq->vector);
173 cq->vector = mdev->dev->caps.num_comp_vectors;
177 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
179 struct mlx4_en_dev *mdev = priv->mdev;
180 struct mlx4_en_cq *cq = *pcq;
182 mlx4_en_unmap_buffer(&cq->wqres.buf);
183 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
184 if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) &&
186 mlx4_release_eq(priv->mdev->dev, cq->vector);
194 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
196 napi_disable(&cq->napi);
198 napi_hash_del(&cq->napi);
201 netif_napi_del(&cq->napi);
203 mlx4_cq_free(priv->mdev->dev, &cq->mcq);
206 /* Set rx cq moderation parameters */
207 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
209 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
210 cq->moder_cnt, cq->moder_time);
213 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
215 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
216 &priv->mdev->uar_lock);